/Engine/Source/Runtime/SlateCore/Public/Debugging/SlateDebugging.h
struct FSlateDebuggingInvalidateArgs
ESlateDebugging...
InvalidateInvalidationRootReason
EInvalidateWidg...
InvalidateWidgetReason
constSWidget&...
WidgetInvalidated
constSWidget&...
WidgetInvalidateInvestigator